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Discrete State-Variable Multimode 24 dB/oct VC Filter. 12HP.

 

 

 

State-variable filter is 12 dB. To get 24 dB is needed to place two 12 dB filters in series, as I made in my DD VCF. But then both 12 dB filters have resonance loops, so the resonance has double loudnes.
I wanted to solve that and make 24 dB State-Variable filter more 'correct'.
So I installed dual gain cells and got single 24 dB State-Variable filter.
The filter works very correct. It has stable equal loudness resonance and selfoscillation in full frequency range.
So who wants very correct preciese filter. This is it.
I think nobody makes this way, I never saw.
As other L-1 discrete filters, the circuit is based on original Discrete Blacksea gain cells and best silver-mica capacitors.

 

 

 

 

• Discrete multimode voltage controlled filter.
• 4 of Discrete Blacksea gain cells in the core.
• 4 of best quality silver-mica capacitors.
• LP, BP, HP outputs.
• State-Variable filter with dual gain cells provides 24dB/oct filtering with control over frequency and resonance.
• Full voltage control over cutoff frequency and resonance level.
• 1V/oct standard frequency control.
• Stable, equal loudness resonance and selfoscillation in full frequency rtange.
• Power consumption: V+ 52mA, V- 47mA.

 

Price $290 + $15 shipping.

 

Paypal: info(at)greenexpo.by

 

 

 

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(c) L-1 Synhesizer. E-mail: info@greenexpo.by